Counting machine cobpobation



A. POOLE May 13, 1930.

COMPUT ING MACHI NE File-5. May l. 19?? 7 Sheetsqsheet A sNvENTmR dwp H15 ATTQRNEY A. F. POOLE May 13, 1930.

COMPUTING MACHINE Filed May l 1923 7 Sheets-Sheet Q INVENTR l l Q f- WITNEEEEE M@ @MLM May 13, 1930. l A. F POOLE 1,758,172

COMPUTING MACHINE WWNEEEEE MCM -WQ/ENTER 75 Pv-Q m/ATTERNEY May 13, 1930, A. F. POOLE: 1,758,172

COMPUT ING MACHINE INVENTR v /f/HE ATTDRNEY May 13, 1930.

A. F, POOLE 1,758,172

COMPUTING MACHINE Filed May l 1923 5 '7 Sheets-Sheet WITNEEEE /95 INVENT HIE ATTRNEY May 13, 1930. A. F. POOLE COMPUTING MACHINE Filed May ll 1923 '7 Sheets-Sheet INVENTR HIE ATTURNEY May 13, 1930. A F POOLE 1,758,172

COMPUTING MACHINE Filed May l, 1923 '7 Sheets-Sheet 7 INVENTUR WWNEEEES 47 MM,

/L/M 5MM,

48 Q HIE ATTDRNEY Patented May 13, 1930 UNITED' STATES PATENT OFFICE ARTHUR I'. POOLE, OF PELHAM IIANOR, NEW YOR, ASSIGNOR TO REMINGTON AC- COUNTING MACHINE CORPORATION, OF NEW 'YORK1 Y., A CORPORATION OI m YORK Application led Hay l, 1983.

My invention relates to computing machines and it has for its principal object to provide certain improvements in function or symbol computingmechanism of the General character set forth in my application fbi' Letters Patent filed November 17, 1921, Serial No. 515,887, now Patent No. 1,528,567 dated March 3, 1925. In many respects the present inventionmay be regarded as an improve ment on thaty set forth 1n said application.

Another object of the invention is to provide certain locking devices and other improvements in computing1r mechanism.

To the above and other ends my invention consists in certain features of construction and combinations and arrangements of parts, all of which will be fully set forth herein and particularly pointed 'out in the claims.

One embodiment of my invention is illulstrted in the accompanying drawings, in

w uc

Figure 1 is a partial front view, frag-` mentary in its character.`

Figure 2 is a similar view on a smaller '25 scale but showing more of the, machine.

Figure 3 is an enlarged side elevation of one of the s mbolv computing registers taken in section )ust inside the right-hand side plate, together with some of the associated mechanism.

Figure 4 is a rear elevation of the symbol computing register with some parts broken away and some omitted.

Figure 5 is a partial front view of the interior mechanism of the register in section on the line 5, 5 of lFigure 3.

Figure 6 is a partial sectional view of the upper part of the register, the section being taken on the line 6, 6 of Figure 5.

Figure 7 is a developed diagram of the gearing in the register.

Figure 8 is a .fragmentary operating view, in side elevation, of certain arts of the mechanism of the register, sai parts shown operated by the master dog of the machine.

' Figure 9 is a partial plan view of the interior of the register, some parts being in section about on the line 9, 9 of Figure 5.

Figure 10 is a fragmentary right-hand end COMPUTING vMACHINE Serial No. 635,847.

elevation of a part of the machine showing l certain locking mechanism.

Figure 11 is a plan view of a portion of said mechanism, partly in section on the line 11, 11 of Figure 10.

Figure 12 is a perspective view of a porapplied to the combined typewriting and computing machine shown inthe patent to Wahl No. 1,270,471, dated June 25, 1918, to Which patent reference is made for the general construction and mode of o eration of the machine. Said machine khas een manufactured for a number of years and is Wellknown in the art as the Remington accounting machine. Said machine consists essentially of a Remington typewriter having attached thereto the computing mechanism describedin said Wahl patent. Said typewriter has a cylindrical platen conventionally indicated in Fig. 2 at 15 and it also includes the usual numeral keys and usually also letter and other keys, and operated by said keys in addition to the type bars of the writing machine is the usual Wahl calculating or computing mechanism which comprises amon other things a master Wheel 16, Fig. 3, and master dog 17, these constituting parts of the actuator of the Wahl mechanism. The main frame piece of said actuator is a casting 18 which,as described in the aforesaid Wahl patent, is suitably mounted on the top plate of the typewriting machine. This casting has secured thereto in one Way or another several vertical forwardly projecting frame plates including a plate 20 at the extreme 4right-hand end of the machine, a second plate 21, Fig. l, and other plates 22, one of which shows in Fig. 3. A truck 23` is connected at each of its ends by a bracket 24, screw 25 and bracket 26, with the typewriter carriagev so as to travel right and left therewith, said bracket 26 being rigidly secured to said typewriter carriage. This truck is guided at the middle of the machine by certain rollers 27 of which one is shown in Fig.

mounted on a bracket 28 integral with the. frame bar 18. The wheel 27 is integral with anarbor having a nut 30 on its upper end.

Said truck 23 has mounted on its lower edge a rack bar 31 into which the horizontal arm of the master dog 17 is adapted to engage during the effective part of each key stroke.

Any desired number of totahzers or registers' can be mounted on and adjusted/suitably along the truck 23. In the present 1n` stance I have shown in Fig. 2 one dummy 32 and one totalizer or register 33, besides my symbol computing registers.

The Wahl mechanism also includes a cross totalizer 34 mounted on a cross truck 35, which truck travels to the extent of one computing zone b ball bearings on a statlonary rail 36 secure to the frame plates 20 and 21. This totalizer yis actuated by a cross master wheel 37, Fig. 1, which has suitably associated therewith a master dog that engages a rack 38. The truck 35 is normally held in its extreme right-hand osition b turning spring 40 and it 1s adapte to be drawn along toward the left by the vertical totalizers or dummies 32, 33 by means of a hook 41 pivoted at 42 to a bracket 43 of the cross truck 35. This hook is accompanied by a detent 44. The hook 41 and detent 44 cooperate with certain lugsy projecting from the right-hand frame plates of the dumm1es' or totalizers.

Each of the master wheels 16 and 37 is capable independently of the other of turning one way for addition and the other way for subtraction and of being disconnected so as 'not to turn, 'said wheels being controlled in this respect by various devices shown in the Wahl patent referred to, said devlces includin certain cams 45, Fig. 2, mounted on suitab e ones of the vertical totalizers or dummies, said cams controlling a follower roller 46, and various connections therefrom.

The Wahl mechanism includes a number of locking devices, apart of one of which is indicated in the drawing, this being alever 47 pivoted at 48 to the frame plate 20 and normally inclined leftward by a spring 50. This lever is adapted to be moved rightward by an adjustable stop piece 51 on the cross truck 35. It controls a sliding link bar 52 which is connected through certain mechanism with means for locking the universal bar of the computing mechanism and therefore Ithe numeral keys of the machine under certain conditions fully set forth in the Wahl patent. .In the present case the illustration of this lever and link is intended as a conventional illustration of a lock for the numeral keys of'the machine. j i

The Remington accounting machine partially shown in the drawin s also includes clearance proof mechanismor the cross totalizer 34, the greater part of which is yconstructed according to the invention disclosed in my Patents, No. 1,483,679,'dated'Feb. 12,

two prior ap lications mentioned. Said clearance t proo mechanism includes a pivoted device or finger 53 projecting upward from the upper rear ri ht-hand corner of the totalizer 34 and capab e of occupying. a forward position and a rear position, said finger being connected by means shown in the prior vpatents referred to, to a feeler comb so that when all of the register wheels of the' cross totalizer stand at zero, said fingerlis free to move to its rear position, but when any one of said wheels is not at zero, said finger is forced to occupy its forward position. It is shown in the drawings in its rear position.

Portions of the clearance proof mechanism and also of certain other mechanism are 'mounted on a frame piece 54 secured, Figs. 1

out, but in its main features it and 2, to the frame bar 18 by the same two screws 55 which fasten the plate 20 to said bar. The frame piece 54 is stamped and formed of sheet metal and it has projecting forward therefrom a headed screw post 56, Fig. 10, on which is pivoted the hub 57 of a three-armed lever 58, which lever is normally drawn counterclockwise (Fig. 1) by a spring 60. The depending arm of said lever has a lugl which, when the lever is turned by said spring, is adapted to operate the locking lever 47 and lock the numeral keys. It can bel moved to its unlocking position by' a finger piece 62. It is normall held in its unlocking position by means o a latch lever 63 pivoted on a post 64 projecting from the frame lplate 54, said latch lever having a shoulder llO ing zonein which thecrossjtotalizer is supposed to be cleared by setting its actuator for subtraction and writing on the aper the total indicated. If the total has been correctly copied it will have brought the cross totalizer to zero or clearance, in which event the finger 53 will be capable of assuming its rear position and will, on the immediately following jump-back of the cross truck 35, restore the locking lever 58 to its normal osition. These parts are shown in the drawing at this stage of the operation; that is to say, a total has just been correctly copied fromv the cross footer' which has thereby been cleared and the cross footer has jumped back and the finger 53 has restored the lock lever 58. This it has done by running under the edge of a bar 66 rigidly mounted y means of posts 67 on the leftward extending horizontalarm of the lever 58, said bar 66 having its left-hand end made on a bevel as shown.

lVhen the latch lever 63 was tripped and the n lock lever 58 moved to its locking position, this leftward arm of said lever dropped downward and was immediately cammed up again by the finger 53 running under it on the jump-back of the cross footer.

In this jump-back operation the finger 53 was guided to its rear position by a cam 68, Figs. 10 and 12, consisting of a flange bent rearward from a depending part of a lever 70, which lever is pivoted on a vert-ical pivot 71 to a horizontal shelf 72 bent oft' from the bar 66. The lever is-normally impelled toward the rear by a spring 73 connecting it with an ear of the bar 66. The whole construction, as more fully explained in my Patent No. 1,491,167, is such that if the cross totalizer is clear on the jump-back, the cam 68 will draw the finger 53 rearward underneath the bar 66, which bar will be restored as described; but if the cross totalizerbe not clear at the time, the finger 53 will be unable to move toward the rear and the lever 70 will therefore he forced to yield toward the front of the machine against the tension of the Aspring 73. Under these conditions the' finger 53 will not move under the bar 66 but will pass in front of it, leaving said bar and the balance of the lever 58 in locking position, thus indicating to the operator that the total was incorrectly copied.

The machine is shown in the drawings set up for posting a loose leaf bank ledger, one sheet, 74, of which is indicated in Fig. 2 mounted on the platen 15 of the typewriter. The sheet is ruled in four columns respectively designated for Deposits, Checks, Balance, and Pick-up balance. Mounted on the truck 23 are a dummy 32 corresponding to the Deposit column; a totalizer or register 33 for the Check column; one of my symbol computers 75 for the Balance colunm;'and a second symbol computer 76 for the Pick-up balance column. The method of posting such a ledger sheet is as follows: When the sheet is put into the machine the last item on it is t-he balance previously written in the third column. This balance is copied into the fourth or f/Pick-up balance column, the act of copying it causing it to be added in the cross totalizer 34. The carriage is then drawn back toward the right and line spaced and any deposits and checks required to be entered on that particular day in this particular account are written in their respective columns, the amounts of the deposits being automatically added 1n the cross totalizer and the amounts of the checks subtracted. yThe new balance will .then be shown on the cross totalizer 34 and' will be copied in the third column, said cross totalizer meanwhile being automatically set for subtraction, with the result that the copyingtof the balance clears said cross totalizer. The particular function performed in this operation by my symbol computers has to do with the fact that the correctness of the Work on these ledger sheets depends among other things on t-he correct writing of the pick-up balance, which if it be not correctly copied from the third column will of course introduce an error into the new balance and into the books generally. As the operator has to perform this copying operation every time one of these sheets is put into the machine, it will be seen that chances for error due to this cause are very great, and this has been in the ast one of the greatest drawbacks to this le ger system. As has been explained in my patent above referred to, it is the purpose of these symbol computers as applied to this particular piece of work to give mechanical indication of any error made in copying the old balance from the paper. To this end when the newly computed balance is first Written in the third column, a function or symbol of the number, or of the digits of the( number, is computed in the register 75, said function or symbol consisting in the present instance of two digits M and N, Fig. 1, showing through suitable sight openings in said register. This symbol is written in the column 77 to the right of the balance, being copied there from the register, and the act of sof copying said symbol restores the symbol computing register 75 to zero. As will hereinafter appear, means are provided to give a mechanical indication of any error made in copying this symbol from the register so as to assure that it be copied correctly. When in a subsequent operation on this particular ledger sheet this balance is copied in the fourth column, its symbol is likwise copied in a column 78. The act of copying the old balance in the fourth column automatically results in the computation in the symbol computing register 76 of the` same symbol that was previously computed in the register 75. But the register Wheels do not carry any numbers and the symbol cannot be read from the sight openings 80 of register 76 but must be copied from the column 77. As the mechanism of the two registers is substantially identical, the copying of the same identical balance in column 4 will compute the same symbol as was computed in column 3 and the writing of that symbol in column 78 will automatically restore register 76 to zero. Means are provided to give a mechanical indication at the proper time of failure of this register 7 6 to come to zero, and this will be an indication to the operator of an error in copying the number or its symbol from the paper, which error he can 'correct by comparing the figures llO written in column 4 with the figuresjustto the `left of them in column 3. In short, if the locked up and the balance is not correctly copied from the third column of the paper, the machine will be operator thus notified of his error. v

The totalizer/B?) is provided with a subtractioncam 45 which, acting on the follower 46, automatically sets the cross actuator for subtraction. The dummy 32 being unprovided with such a cam, 4numbers written in the first/'column will be added in the cross totalizer. The symbol register 75 is provided Y with a cam 81, the left-hand part of whichycorresponding to the amount of the balance lwritten in the third column, is of a level such as to set the cross totalizer for subtraction. The right-hand part' 82 of this cam is of an intermediate level adapted to disconnect the cross'totalizing mechanism so that the digits j of the symbol written in column 77 will not affect the cross-master wheel 37,. which will remain stationary while said digits are being written. The symbol computer 76 -is provided with a cam83, the left-hand part of which, corresponding to the amount of the pick-up balance, is at a level to cause addi-v tion in the cross totalizer; andv the right- 3-9 inclusive, The framing of this registerl is Asimilar in many respects to that of-an ordinary Wahl totalizer;y comprising as it does two side plates 85 connected together by several cross bars and rods of which three, namely, 86, 87 and 88, in the lower front part of the register, are or may be exactly like corresponding parts of a Wahl totalizer, the

A bars 86 and 88 being mortised at their ends i into theside plates 85 and the bar 87 mountedv after the ordinary fashion of the Wahl totalizer; lIt is to the bar 884 that the cam 81 of register 75, and cam 83 of register 7G are secured. There is at the upper rear part of the register another cross bar 90 doveetailed into the side plates in the same way as the similar bar in the Wahl totalizer, although this bar 90 has been modified in some other respects, as y,will appear hereinafter. framing also `includes a cross shaft 91 on which are journaled a series of thirty-,toothed gears 92, said rod and gears occupying the same position as the corresponding parts of the Wahl totalizer, although the gears themselves are not provided with the transfer devices of the Wahl mechanism. The register also includes the two frame rods 93 and 94 in the lower back part of the register, these corresponding in positionfand the lower one,

94, to a certain extent in function to rods in the ordinary Wahl totalizer. The s1de plates The y are at their rear of dove-tail outline to'proi vide for mounting on the truck 23 in precisely the same way as a Wahl totalizer. The

register is also'capable of being adjusted and i secured in adjusted position on the truck in a way much like that of the Wahl totalizer; that is to say, said register is provided with a rock shaft 95 from which a finger piece 96 projects upward and forward through the casing plate 97. This shaft has rigidly mounted thereontwo hooks 98 adapted to be caught over the'dove-tail party of thetruck 23 against which they are firmly pressed by .a spring 100. One of-these hooks 98 has a tooth 101 which is ada ted to enter the interdental spaces of a rac bar 102 fixed to the truck 23 to hold the register in exact ad- !justed position along said truck. These parts do not differ at all in 'principle and but little in details from the corresponding parts of a Wahl totalizerexcept that the locking tooth `101 and linger piece 96, instead of bein at the extreme right-hand side, as in the ahl construction, are a little to the left thereof,

'this being to avoid interference with parts of the register mechanism.

The frame ro'd .or shaft91 has reduced ends that pass part-way through the frame plates to which they are secured by screws 104, Fig. 5. The thirty-toothed gears 92 are plain spur gears, as shown in Figs. 3 and 5, being strung along the shaft 91 and suitably spaced as by'washers 105. For reasons which will hereinafter appear, there is one of these gears not only for each significant letter space position of the numbers to be 'written but also the punctuation points are preferably provided with these gears. Otherwise expressed, there is a gear 92for each letter space of the Balance column, irrespective of whether or not the numbers as vactually written are spaced for punctuation. Asindicated in Fig. 2, preferably a letter space position is left between the last digit of the balance and the first' or M digit of the symbol, and this unctuation point is covered by the left-han half of a gear wheel 92", Fig. 5, of doublewidth,

the left half of they gear corresponding to lrepresents the shaft 108 in longitudinal section. Each of these shafts has a series of pinions on it and as here shown each of them may be made by suitably turning down a piece of pinion wire, leaving pinions projecting whereyrequired.

Figure 7 isa developed diagram of the gearing, the right and left location of the several gears 92 being indicated by broken lines. From this diagram it will be seen that the shafts 106 and 107 are geared together to turn in opposite directions by thin pinions 110 at their left ends, thesepinions not meshing with any gear 92. Also the shafts 108 and 109- are similarly geared together by a thin pinion 111 on shaft 109 meshing With a Wide pinion 112 on shaft 108, said pinion 112 being Wide enough to mesh with the irst'or highest gear 92, as indicated in Fig. 7 and also in Fig. 5. These four shafts have dis tributed along and among them a number of pinions-113, one pinion for each gear 92 and one for the double gear 92". i

A shaft or rod 114 is mounted in the upper part of the register by screws 104, the same as the shaft or rod 91, and this shaft 114 has journaled thereon near its right-hand end two rotary devices 115 and 116,F ig. 9. The right-hand-part of the device 115 consists of a gear 117, and the right-hand part of the device 116 consists of a gear 118, both of which gears show in Fig. 3, because in the particular rection by the other.

design here shown, they do not happen to stand with their teeth in exact alignment. The gear 117 meshes with a pinion 120 of the first or M dial 121 on which the M digit of the symbol is computed and the gear 118 meshes with the'pinion 122 of the right-hand or N dial 123 on which the N function is computed. These dials can be variously marked but in the present instance those of the register are marked With the ten digits, 0-9 as usual. In fact, in the specific instance shown in the drawing, these are two ordinary Wahl register dials. Said dials are suitably journaled on a cross shaft 124 mounted at its ends in the frame plates 85, the dials being located and spaced by a collar 125 and washer 126. A collar 127 fixed to the shaft 114 prevents endwise motion of the devices 115 and 116.

As indicated in the diagram,Fig.7 ,the gear 117 which drives the M dial 121 meshes with one of the pinions 113 on the shaft 107 so that this M dial is driven by the two shafts 106 and 107, in one direction by one of them and in the opposite direction by the other. The gear 118 meshes with one of the pinions 113 on the shaft 108 so that the end dial is driven by the shafts 108 and 109, in one direction by one of said shafts and in the opposite di- The gearing is such that when the master wheel 16 meshes with a gear 92 which is directly geared to the shaft 107, the M dial 121 will be turned in the same direction as the master Wheel and when said master wheel mesheswith ay gear 92 which directly drives the shaft 106, said M dial will be driven in a direction the opposite of that of the master Wheel. Similarly when said `master vwheel engages a gear 92 which is geared directly to the shaft 108, the N dial 123 will be turned in the same direction as the master wheel and if said master wheel be geared to the shaft 109, then the N dial 123 will turn in the opposite direction from that of the master wheel. The digits are so arranged on the dials 121 and 123 that when the master Wheel 16 is driven for addition, it has the effect on saidv dials of subtraction when the dials turn in the same direction as the master Wheel and of addition when the dials turn in the opposite direction from the master wheel. In practice the master wheel 16 is driven additively when working on these symbol computers so that digits which directlyturn the shafts 106 and 109 are added on the dials 121 and 123 respectively, and digits written when shafts 107 and 108 are directly actuated, are subtracted on said dials.

It will be understood that the gearing can be varied so as to compute different functions or symbols of the numbers written. The particular gearing hereinbefore partially described land hereinafter further described, is such that the first, third, fifth, etc. gears 92, beginning at the left of the series, actuate the shaftsrr108 and 109 of the N train of gearing, and the even numbered Wheels, the second, fourth, sixth, etc. actuate the forward shafts 106 and 107 of the M train of gearing, all as will be apparent from'a little study of the diagram, Fig. 7. Furthermore of those wheels 92 .which operate on the M train, the first works the shaft 108 and therefore acts subtractively on dial 123; the next works shaft 109 and therefore acts additively on dial 123, and so on, the successivedigits that operate the N train acting subtractively and additively in alternation. A similar thing is true of the even numbered digits which act on the M train, the first of which, that is to say, the second digit of the number, operates the shaft 106 and therefore adds on the M dial 121; the next one, that is, the fourth digit, works the shaft 107 and therefore subtracts on the dial 121, and so on. As has been said above, this scheme can be varied in many Ways, and I have myself in a prior application, now Patent No. 1,519,328, dated Dec. 16, 1924, shown a symbol computer in which the symbols are altogether different from those computed in the present instance. Y

v' In the diagram, Fig. 7, it will be noted that the third letter space from the right indicated by the broken line corresponding to the left half of the gear 92, does not contain any pinion 113 but the second s ace from the right, corresponding to the rlght-hand half of the Wide gear'92, contains a pinion 113 on the shaft 107 so that when the 'M digit is written on the paper, it will be subtracted from the M dial 121, thus restoring that dial to zero. The right-hand gear 92 meshes with a pinion 113 on the shaft 108 and therefore turns'the N dial 4123 subtractively so that if in this posit-ion of the carriage the Ngfunction be written, the N dial 123 will be restored to zero. f

The MI and N dials 121 and 123 have 1n position when not being turned by the master wheel, it is suflicient to hold the two gears 117 -and 118 because all of the other gears are geared to these, about half of the gears 92 being geared to 117 and the remalnder to gear 118. The means 4for thus. holding the gear trains in proper position can be varied but as here shown it' comprises two detents 128 and 130, each provided with a tooth 131,

Fig; 3, normally engaging the gears 117 andy 118. As best shown in Figs. 35 and 8, these two detents are rigidly mounted as .by pins 132 on a rock shaft 133 1n the upper part of the register, said rock shaft being pivoted in the side plates 85. This shaft is shown with two other arms 134 fixed thereon and projecting downward'and rearward therefrom and in these two arms and in prolongations of one or `both of the detents 128 and 130 there is inserted a wire 135 constituting a universal bar for certain key'operated devices presently ,to be described. A spring 136 is stretched between one of these arms and a hook piece 137, Figs. 3 and 9, strung on shafts 114 and 124 and secured against endwise motion by collars 138 on one of said shafts, said springinormally holding the detents 128Vand 130 1n operative position, from which they can be lifted as shown in Fig. 8.

In order to operate universal bar 135 at each key depression, a series oflevers 140 is provided, the upper ends of which lie in front of said universal bar, and which levers are pivoted on the frame rod 94 in much the same manner as certain levers connected with the transfer mechanism of the Wahl totalizer. Said levers 14() are held in normal position by'springs 141 connected toy a cross rod 142 in the same manner as in the lVahl totalizer. These levers project below the register in position to be operated by the master dog 17 in precisely the same way as the transfer levers of a Wahl totalizer, and some of them may be made longer than others, as indicated at 1.43 in Figs. 3 and 4. These prolongations 143 are situated one just at the right of each space in which it is desired that the keys be locked. In the present instance there are two of them, one on the extreme leftfhand lever 140, and one on'that lever 140 just to theright of the sub-units space /These prolongationsact in the same I Way asin the Wahl machine; that is to say, they are adapted to be operated by ajshort portion 144, Fig. 3, of the masterdog 17, and are adapted to be arrested by a cross bar 145 on the actuator the same as in the Wahl machine, said cross bar having in it just back' of the master wheel a notch into which the lower ends of the levers 140 can move when operated by the long tooth of the master dog. In this way the keys cannot be operated in the two positions mentioned. It may be added that the cross tot-alizer shown in Fig.

1 Vhas, no punctuation except the decimal point but that if it had s aces for commas, or if it were spaced for ritsh money, for

example, the keys would be locked at those spaces by the master dog of the cross footer. It will be understood that in the lirst part of the down stroke of a key the master dog 17 rocks to the position shown in Fig. 8, wherey upon that particular lever 140 which happens to be in register with it will operate the universal bar 135, as yshown in said ligure and release the wheels 117 and118 as shown.A

During the next part of the down stroke of `the key the master wheel 16 vis turnedy to operate the computing mechanism anda/t the f last part `of the down stroke the master dog returns to normal position, allowing the detents 128 and 130 again to lock the gearing.

It will be perceived" from the description just above that at each key depression both trains of gearing are released from the dogs 128`and 130 but only one train of gearin is in mesh with the master wheel, and the ot er train is therefore free, so far as the'detents are concerned. Said other train is however ordinarily locked by an aligning device 146, Fig. 3, which is part of the Wahl 'actuator'. This is a stationaryfblade occupying the position shown in Fig. 3, and it is used to line up the thirty-toothed gears as they pass successively across itin the stepping of the carriage towards the left, this bladealways engaging that wheel 92 immediately at the' right' of the one in engagement with the master wheel 16. It will be recalled that when the master wheel is in engagement with one of the gears 92 the one next to the right of it and locked by this blade 146, is a member ofthe other train of gearing so that when one train of gearingis connected with the master wheel the other is locked by this blade. This is one reason for having gears 92 in the punctuation yspaces. Another reason is that except for the wide gear 92* this register has a gear for every letter space position so that it will work equally well with all styles of punctuation in thecross tot-alizer 34. As to the gear 92a itself the left-hand half of lit is used exclusively for this locking purpose, it never being turned by the master wheel.

The method of lockingjustabove described is however inapplicable when the last wheel 92 to the right' is in engagement with the master wheel 16, and I have therefore provided 'a llt special lock for the M train of gearing at that time. To this end the last lever at the right has pivoted thereto at 147, Figs. 3 andv 8, a locking device 148 consisting of a bar eX- tending toward the front of the machine and having in its forward end a horizontal slotv .is such that when the carriage stands in the position shown in Fig. 1, that is to say, in position for writing the N digit of the symbol, and a key is depressed to write such digit, the lever 140 being operated as shown in Fig. 8, draws the tooth 152 into locking engagement with the gear 92, thus locking the M train of gearing.

From a little consideration of the general scheme of the invention, it will be apparent that the symbol computing register when correctly operated, is normally clear, that its dials are displaced from their normal zero positions as soon as the operator begins to write the balance, andthat they are returned to Zero position by the act of writing the symbol. In

y order to give a mechanical indication of clearance or non-clearance of these dials, various devices may be employed and to provide improved devices for this purpose is one of the objects of the present invention. To this end each of the gears 117 and 118 preferably has a number of teeth equal to some multiple of the number of teeth in the pinions 120 and 122 of their respective dials, and in thepresent instance each of these "ears has twenty teeth so that a half rotation of one of these gears corresponds to a full rotation of the associated dial. Each of the rotary devices 115 and 116, of which the gears 117 and 118 are parts, has as its left-hand part a flange 153, best shown in Figs. 6 and 9, but also shown in broken lilies in Figs. 3 and 8. These flanges are not indicated in the diagram, Fig. 7. They are integral respectively with the gears 117 and 118 and are spaced leftward therefrom. Each of these flanges has at diametrically opposite sides thereof two cut-outs 154, the flanges themselves and their cut-outs being adapted for co-operation with two feel'er noses 155, said noses projecting from arms 156 pivoted on theshaft 133, as best shown in Figs. 5 and 6. These two arms 156 are made of a single piece of sheet metal comprising also a cross or bail piece 157, the whole device,

being of course made by bending an appropriately shaped piece of sheet metal back upon itself. One of the arms 156 lies between the hubs of the two detents 128 and 130 which prevents motion of the device endwise of the shaft 133. It will be perceived that the whole device is pivoted on the shaft 133; that one of its noses bears on the flange 153 of the gear 117, and the other nose on the corresponding flange of the gear 118; and that if either of these gears is displaced from zero position the corresponding nose 155 rides on the periphery of the flange as shown in Fig. 6 but that if both gears are in zero position the two noses can both enter notches 154, thus allowing the fceler device to drop forward from its non-clear position shown in Fig. 6 to its clear position shown in Fig. 3. As best shown in Figs. 5 and 6 the left-hand arm 156 of this feeler device has an open-ended slot 158 into which a pin 1GO-projects from an arm 161, which arm is fast on a rock shaft 162 pivoted at its ends in the side plates 85. A spring 163 connected at one end to a pin 164 projecting from the arm 161, and at its other end to a fixed part, presses the noses 155 against the flanges 153 and when either train of gearingis displacedfrom its zero position the feeler device is forced outward against the tension of this spring, such outward motion of the feeler rocking the arm 161 and shaft 162 clockwise in Figs. 3 and 6. Fast on the shaft 162 at its lefthand end is a finger 165 which extends upward through a slot in the cover plate 97, projecting a short distance above the register. Fast on the right-hand end of the shaft 162 is a second finger 166 which also extends upward through a slot in the cover plate 97 projecting above the totalizer tothe same level as the finger 165. The construction is such that when both symbol computing dials show zero these fingers 165 and 166 occupy a forward position, shown in full lines in Fig. 3, and that when one or both of said dials is out of its zero position these fingers occupy a rear position shown inpFig. 6 and also in broken lines in Fig. 3. These fingers a control certain locking mechanism which will be described hereinafter. j

I have mounted on the main frame piece 18 of the actuator above and about the bracket 28 a sheet metal housing and framework designated generally by the reference numeral 167. This can be variously constructed but as here shown it is all stamped and formed out of a single piece 0f sheet metal. As best indicated in Figs. 1 and 11, said housing comprises at its right and left ends a foot piece 168 which rests on the upper edge of the casting 18 to which it is secured by al screw 176. Beginning the description at the right-hand end, the metal is bent upward to form a righthand end wall 171, thence horizontally to form a roof 172, thence downward to form t-he left-hand end wall 171 and thence horizontally to form the left-hand foot piece 168 which is secured to the casting 18 by another screw 170. -The back part of the roof` prtionf172 is bent first downward and thenl in j the inclinedform shown to make a rear wall' 173, which preferabl closely meets the end walls 171 so as to ma e an enclosed housing. The front. projecting part of the roof 172 1s also bent downward horizontally to make afront flange 174 on which may be placed vertical line 175 to serve as a pointer co-operating with the usual scale provided on the cover plate 97 of the symbol re isters and the cover plates of the totalizers. he rear late 173 1s flared rearward at the bottom, as est shownl Y gether and spaced apart by washers.. Inside of the innermost of the'thre'ebails a sleeve 180 is mounted on the rod 178 between the rear arm of said bail and the bracket 176 and said sleeve is secured to the rod by-a set screw 181 which prevents endwise motion of the rod,

vso that the Wholev thing can'be assembled by putting the bails and sleeve in'place and inserting the rod from the rear, afterwards tightening the set screw 181.

The outermost one ofthe three nested bails is numbered182 and it has its forward arm prolonged toward the right, and a lug 183 is riveted to the front face of the free end of said* arm. This lug as `best shown in Fig. 1 is of V-shape, the point being downward, and it lies in the path ofthe fingers 165 and 166 when said fingers occupy their rear positions, indicating that the symbol computing register is not clear; but when said register 1s clear, said fingers pass in front of and do not engage said lug. The situation of this lug with respect to right and left is such that in case the symbol computing register is not clear, said lug will be cammed upward by the finger 165 as the register 75. entersy a computing zone in its motion toward the left, or leaves a computing .zone in its motion towards the right, and

ythat the finger 166 will raise/said lug as the register moves out of a computing zone toward the left or into one toward the right.`

As shown in Fig. 11, the finger 1.65 is just to the right of the Vleft-hand frame plate 85. The finger 166 is bent off so as to brin vits up,- per end just to the right of the rig t-hand frame plate 85. The whole construction is such that the lug-183 is operated whenever clearance is bent off toward the rear as shown .the end wall 171 of the in Fig. 10 and carries at its lower end a pivot pin to which is ivoted the left-hand end of a push bar 185, t is being the rearmost one of three such ash-bars shown in the drawing, all of whic pass through the guide slots in ousing 167 and extend toward the right. The bar 185 passes through a suitable hole in a bracket 186 bent off from the frame piece 54 hereinbefore described. The end of said bar stands in operative relation to the upper end of a. latch lever 187 similar to and pivoted on the same post 64 as the latch lever 63 hereinbefore described. The lever 187 is of bell crank form and its horizontal arm has a shoulder which normally restrains motion of an ear 188 bent off from aY lever 190the hub of which is pivoted just back of the lever 58 on the post 56. Said lever 190 at its lower end has an ear 191 adapted to operate a branch 192 of the locking lever 47, said branch having been riveted at 193 to said lever 47 for th1s purpose. The lever 190 hasanother ear 194 shaped into a restoring key and said lever is operated by a `spring 195 which connects its upper arm with a depending arm of the latch lever 187 the same as has already been described in connection with the spring 60. The whole construction is such that whenever the lug 183 is operated by the passage of the register 75 into or out of a computing zone at a time when said register is not clear, the bar 185 is momentarily moved toward the right, tripping the latch lever 187, thusallowing the spring 195 to operate t-he lever 190 and locki'ng lever 47, and thus locking up the machine. It will be understood that when the machine is correctly operated theregister 75 never either enters or leaves a com uting zone eX- c'ept in a clear condition, an if it ever does either of those things when it is not clear, the machine is locked up to notify the operator that a mistake has been made. The operator having been thus notified can instantly unlock the machine by a tap of the finger on the key 194. The key 194 and the key just to the right of the frame plate l2O, and they are preferably adjacent to each other so thatboth can be struck by one blow of the finger, the two locking means being so related 62 both lie that it is never necessary Ato release one of v them and to leave the other locked.

The innermost one of the three bails mounted'on lthe rod 178, said bail being here numbered 196, has for its function the operation of the trip lever 63, which as has already'been described is a part of the. clearance proof mechanism for the cross totalizer l34. The forward branch of this bail is prolonged horizontally toward the"right, as shown in Fi 11, and as best shown in Figs. 1 and 11,` 1t

has a trip4 dog 197 pivoted thereto on a pivot pin l198. Said trip dog projects above the bail arm 196 and it has inserted therein a pin 200 having an enlarged head adapted by resting on/'the upper edge of the arm 196 to limit motion of the dog about its pivot in clockwise direction, as viewed in Fig. 1. The dog is turned in that direction by a spring 201 attached to said pin 200 and to the free end of the bail arm 196. Said dog projects below its pivot where it terminates in a sort of tooth having` its left-hand edge abrupt and its righthand edge inclined, as shown in Fig. 1.

As shown, for example, in Figs. 3, 4 and 11, the frame bar 90 of the register 75 has a rearward projection having a cam-shaped flange 202 projecting upward from its rear end; and projecting rearward from a portion of this cam flange is a lug 203, which lug is abru t on its right-hand face and inclined on its le thand face. The depending arm of the dog 197 lies in the path of this lug 203. The construction is such that when said lug engages said dog by the motion of the carriage toward the right, the dog is turned idly about its pivot against the spring 201 without operating the bail 196; but when said lug passes said dog in the leftward travel of the carriage, the

inclined faces of the lug and dog engage each other, the dog cannot turn in clockwise direction and consequently lthe arm of the bail is raised upward momentarily and then allowed to drop. The rear branch of the bail 196 is made with a depending lever arm 204, Fig. y10, which arm is articulated by means of a pivot pin 205 with the forwardmost Vone 206 of the three push bars which pass horizontally through slots in the right-hand wall 171 of the housing 167. This bar 206, Fig. 12, passes through a hole in the bracket 186 and its end isin operative relation to the upstanding arm of the trip lever 63. rThe relation of the parts is such .that the bail 196 is operated to trip the latch 63 in that step of the carriage immediately following the writing of the last digit of the` balance in the third column on the ledger sheet. rllhe next following operation of the machine is to strike the space key and allow the carriage to step into column 77 to write the first or M digit of the symbol. As will appear hereinafter, the hook 41 is cammed loose from the register 75 during the same step of the carriage above mentioned; that is to say, the one immediately following the writing of the last digit of the balance. The whole construction` then is such that at that step of the carriage, which is the instant when the cross totalizer should be cleared, the locking.

lever 58 is operated, the cross totalizer takes its jump toward the right, and if said totalizer is clear as it should be, it will immediately restore said locking lever to normal position. If, on the contrary, a mistake has been made and the cross totalizer is not clear, the machine will be locked and the operator will be unable to Write the symbol, thus calling his attention to the error. He can then unlock the machine by a tap on the linger piece 62 It has been found in practice desirable to 'effect a fairly nice relation between the trip levers 63 and 187 'on the one hand, and their push bars 206 and 185 on the other, and I have devised improved means for this purpose, which means are extremely simple and convenient in practice. The upper end of each of said trip levers 63 and 187 has been folded back on itself and a tapped hole made through the lever thus doubled in thickness into which is screwed an adjusting screw 207. The hole being drilled through the slit between the two holes of the metal, said metal springs a little under the action of the ta by which the screw threads are made so thatthe hole when the tap is removed is a little smaller than the tap; and when the screw 207 is screwed into said hole, the metal is forced apart a little so that said screw is under sti spring pressure which, while not preventing it from being turned with a screw driver, does prevent it from jarring loose and changing the adjustment. A hole 208 in the righthand branch of the frame plate 54 is provided for the insertion of a screw driver by which these screws can be readily adjusted, and they will maintain their adjustment without further thought or attention.

As shown in my patents, Nos. 1,483,679 and 1,491,167, the clearance proof mechanism for the cross footer included a locking lever corresponding to the lever 58 of the present case,a trip lever corresponding to the lever 63, and

`devices for tripping said trip lever at the middle of the machine including a tappet on the appropriate one of the verticaltotalizers. On account of the bracket 28'these trip devices were off-set to the right of said bracket, and this necessitated making the trip device on the totalizer in the form of a bar projecting to the right of one totalizer and extending if necessary over the top of another totalizer. This construction has been improved inthe present case by the device of employing bails mounted as described on the pin 178, thus bringing the parts to be operated around in front of said bracket 28 and enabling the cooperating parts mounted on the registers 75 and 76 to be located within the bounds and usually near the middle of the register.

- In the ordinary Remington accounting machine, and as fully described in the Wahl Patent 1,270,471, the hook 41, which controls the cross truck 35, is picked up by a lug projecting from the right-hand frame plate of each vertical totalizer; and in that step of the carriage immediately following the writing of the last digit in a computing zone, said hook is cammed downward out of engagement with said lug and the cross truck l not be done by making the lu on therighthand frame late 85. A suita le lug for the purpose can e constructed in various ways. As here shown advantage is taken of the fact that no lever 140 occupies the sub-units place on the rod 94 and accordingly a special piece 210 is mounted on said bar as shown in rear viewl in Fig. 4 and in side elevation in Fig. 3. This piece has a hub which iits tightly on the bar and it projects upward enough so as to have in its upper end an open ended crotch or fork which embraces the frame rod 93 to prevent lrotation about the rod 94. This piece is extended downward, its lower end constituting a lug 211 in position to catch the hook 41. In order to space this piece and lug exactly in a right andv left direction without careful adjustment and to maintain it accurately spaced, an arm 212 is bent oil' from the piece 210 toward the right, its righthand end abutting the right-hand frame plate 85, as shown in Figs. 1 and 4.

If when the cross truck is reed'from the lug 211 it jumped clear back to its normal position, its stop piece 51 would strike the locking lever 47 and lock up the machine so that the symbol could not be written. In order to prevent this I have provided improved means which will now be described. Of the three bails which are mounted on the vrod 178 at the middle of the machine, the

that step of the carriage immediately fol-y lowing the writing of the last digit of the balance but also during those steps of the carriage employed in writing the two digits of the symbol. The rear branch of this bail has a depending arm 214 which is articulated with the middle one 215 of the thr'ee bars which pass through s lots in the right-hand wall 171 of the housing 167. This bar 215 is shorter than the other two and is so shaped that its right-hand end is on a lower level than they, its said end being pivoted at 216 to a lever arm 217 which is pivoted on a pin 218 Iprojecting forward from the frame piece y54. The arm 217 is one arm of a bell crank,

the other arm 220 of which extends toward the right and has a headed pin 221 projectinginto a slot 222 in a vertical sliding piece 223. 'Said piece 223 has as viewed from the front of the'machine the shape of an inverted T, its lower end having a cross bar 224. The stem of-said T is at its lower end offset toward the front of the machine lto bring t-he cross bar 224 into the vertical plane of the cross truck 35 for which it is adapted f the arm 220.

to act as a stop. The bell crank 217, 220 is which tends to press the upper end of the slot 222 down against the pin 221 vand also tends to rock the piece 223 counter-clockwise'about said pin 221. This rocking tendency causes the right hand end of the cross bar 224 to rub against the right-hand side plate 20 of the machine frame, as shown in Fig. 1. This piece is shown in the drawings in its depressed position caused by the nose of the bail 213 riding on the cam 202 and infthat position the left-hand end of the cross bar 224 serves as a stop to limit the right-hand e jump of the cross .truck and thus prevent it from operating the locking lever 47. The mechanism is shown in Fig. 1 in position for writing the second or N digit of the symbolk and it will be seen that in the next step of the carriage following the writing of said digit the bail 213 will be released from the cam 202 and the piece 2231will be drawn` upward by the spring 225, thus withdrawing the stop 224 from the path of the cross truck, and allowing said truck to move on to its extreme right-hand position. The slot 222 enables the lever 217, 220 to be operated without breakage of the parts in case the cross truck happened to be in its extreme right-hand position at the time, as it would be when the carriage is drawn back toward the right to begin a new line of writing. Ro-

tation of the piece 223 about the pin 221 is 'I prevented in one direction bythe bar 224 pressing against the plate 2O and in the other v direction it is prevented by a pin 228 projecting forward from the frame piece 54. Upward motion of the arm 220 is conveniently limited by the head of the pin 221 striking the head of the. post 64, said heads being 'suitably flattened for the purpose. VIn order to arrest the return strokes of all of the bails 182, 196, and 213, a stop pin 199` is shown at the left of the rear depending arms of all vof said hails.

In order to provide anadjustment in th train of connections from the bail 213, to the piece 223, the lever 217, 220 is made as shown, for example, inlv Figs. 12 and 13, the latter figure being a central section longitudinal of As here shown, said arm 220 is staked on a hub 230'which is directly pivoted on the pin 218 and thev arm 217 has a hub 231y pivoted on the hub 230.y Said arm 217 has two ears 232 bent forward thereby a second lug on the same register, but t is arrangement gave the cross truck a shorter jumpthan was desirable in order to operate the clearance proof mechanism for the cross totalizer. The present arrangement, including the stop 224, enables me to get a longer jump better adapted for this purpose. In most cases it is more or less immaterial at precisely what point the cross totalizer be arreste the only thing that requires care being that yit be not arrested ata point where the cross computer master dog would be locked as, for example, in. that latter space position just to the left of the first lregister wheel or on a punctuation point. care o f this possibility it may be necessary in some instances to lengthen or shorten the bar 224 to the extent of a letter space or two. Usually if this trouble was encountered it could be overcome by removing of an inch of the bar 224: at its left end.

The symbol computing register 76 is provided with a cam 202 but not with the lug 203 as the cross totalizer is notintended to be clearat the time when the register 76 is in use.

In said register 76 the dials 121 and 123 are .not provided with numeralseand they may be entirely blank. To facilitate making the necessary correction in case one or both lof these dials should ever get normally out of its zero position, it may be preferable to ,aaake each of them with its periphery of a uniform color, for example, red, and tmake its zero position of a different color, for example, black, the latter being the color-usually employed onthe cover plate of the regis- By this means these dials are inconspicuous except when out of their zero positions. '.f one of them got misplaced so that required correction, this could be done by repeated operation of the 1 key until the black spot showedat the sight opening.

. The use of my invention can be understood from the specific instance above described. When the balance is being written inthe third column, its appropriate symbol is computed in the' register 75 and copied in column 77 from said register, which is thereby restored to zero. When this particular ledger sheet is again put into the machine 'that balance is copied from the third column of the paper in the fourth or pick-up balance column on the paper and its symbol is copied from column 77 into column 78. If the copying has been correctly done all will go well but if not, when the register 76 steps out of the computing zone, its finger 166 will operate the lug 183 and cause the-lever190 to be tripped and to lock the machine. If by In order to take vno wheels such as the wheels 92 inthe any chance this register had been out of` normall clear condition at thetime when ...the mac ine was brought into the column,

the samelocking up would have been acof t e pick-up balance would have been prevented until the error should have been corrected. The operator is thus warned both v1n case the register was not in proper condition for use before writing the alance and also after it was written in case the balance had been incorrectly copied. In the machine shown in my patent No. 1,528,567, there was means to lock up the machine in case the .symbol register was not clear but this means was not controlled by the` travel of the carriage. On the contrary, the lock was of such character as to prevent the return stroke of the key when writing the last digit of lthe symbol. The present construction is preferable for several reasonsone of them being that it gives a warning before writing the balance in case the register is not clear, and also being operated by the travel of the carriage it works' better. I

In my prior patent aforesaid, there were aces .set apart for punctuation and the lloc including the tooth 152 which cooperates with ythe gear 92a was not present. With those exceptions the general scheme of computing a symbol was substantially the same as in the present machine. My prior application also shows gear locking devices similar to the detents 128 and in a general way similarly operated and also feelers corresponding functionally with the feelers 156, 155 of the present case. These feelers, however, do not operate fingers like the fingers 165, 166 but operate the other lock referred to.

-Various changes may be made yin the details of construction and arrangement without departing from my invention.

What I claim as new and desire to secure by Letters Patent, is y 1. In a computing machine, the combination with a carriage having an extent of travel equal to a plurality of computing zones, a register, and a master actuator, one of which travels with said carriage, of clearance proof mechanism for said register including means to notify the operator of the state of the register, and means actuated by the travel of the carriage for bringing said notifying means into operation on entering a computing zone and again on leaving a computing zone.

2. Inl a computing machine, the combination with a carriage having an extent of travel equal to a plurality of computing zones, afregister and a master actuator, one of which travels with said carriage, of clearance proof mechanism for said register comprising two fingers, one at the left side and one at the right side of said register, and means actuated comlplished by the finger 165 and the writing,

by said fingersfor notifying the operator of the state of the register atthe beginning and also at the end of a computing zone.

3. In a computing machine, the .combination with a main carriage having an extent of.

travel equal to a plurality of computing zones,

. one or more registers for said plurality of computing zones, and a cross computing register, of alock, means actuated by said cross computing register for operating said lock in case-.said cross computing register is not clear, and separate means actuated by the first mentioned register or one of said registers tor op-.\

erating the same lock in case that register is not clear.

` 4. In a computing machine, thecombination with a main carriage and a register thereon, a jumping cross computer carriage or vtruck, of a stop 'for said cross computing truck,'an`d means whereby said stop is moved to operative and inoperative position by the A first mentioned register.

5. In a computing machine, a symbol computing register mounted on a traveling carldal riage and having therein two trains of gearing, means for operating said trains of gearing one at a time, and a lock thrown into one ytrain of gearing by the actuation of the other train of gearing. '6. In a computing machine, the combination with a master wheel and master dog, of a Symbol computing register comprising a.plu. rality of gears operable by said master wheel and meansoperated by said master dogfor locking one, gear while another gear is being operated.

7. In a; computing machine, the combination of a lnain truck having one or more registers mounted thereon including a register of greater width than a computing zone, a cross truck, means whereby said registers one at a time ick up and release said cross truck, a

' stop or arresting the jump back of said cross truck.

truck, and means whereby said-wide register moves said stop into the path of said cross 8. Ina computing machine, the combination with a traveling carriage anda jumping cross truck, of a stop for arresting the jump vback of said cross truck, and means for movabutment consisting of an adjusting screw screwed through a hole between the two branches or layers of said lever made by folding the metal ofthe lever back on itself.

10. In a computing machine, the combination with a main carriage, 'a register or registers mounted thereon, a jumping vcross truck,.and a hook or coupler'by which said cross truck .intermittentlyconnected with said register or registers, of a. iece in said register for picking up'said ho ated by'said cam and held in operative posi- `tion by said dwell through a predetermined portion ofthe carriage travel, a juin ing cross truck, astop thrown into-the pat of said cross truck bysaid mechanism, said mecha-` or coupler, 'said piece consisting of a plate mounted on a Arod in said register and having alug for conism including a yielding part to enable the mechanism to be operated without operating said stop in case the cross truck is in the way of an operation of-said stop.

12. In a combined typewriting and computing machine, the combination with a traveling carriage having a plurality of registers for d iii'erent columns and a cross totalizer, of clearance proof mechanism for said cross totalizer including trip devices operated by the travel of one of said vertical registersjsaid trip devices including a bail at the middle of the machine lhaving its forward arm operated by a trip device on said register, and notifying devices` operated by the rear arm of said bail.

13. In a combined typewriting and computing machine, the combination with registering mechanism and a traveling carriage, of indicating mechanism including one or more bails at the'middle of the machine, trip devices on a register and acting on the forward arm or arms of said bail or bails and indicating devices controlled by the rear arms of said bails. j f

14. In a computing machine', the combination with a plurality of registers, of a plurality of clearance proof devices one for each register, and restoring keys for said clearance proof devices situated adjacent to each other sothat both can be operated by one stroke of y izo said gears while another of said gears is being actuated by said master wheel.

Signed at the borough of Manhattan, city of New York, in the county of New York and State of New York, this 30th day'of April A. D. 1923.

/ ARTHUR F. POULE. 

